Car-wheel.



O. S. PULLIAM.

GAR WHEEL.

APPLIOATION FILED 00111, um.

899,680. PatentedV sept. 29, 1908.`

ATTO RNEY THE NaRRls Eriks Cu., WQSMINGTON. D. c,

oswALn s. PULLIAM, or PIT'rsBURG, PENNSYLVANIA.

CAR-WHEEL.

i Specification of Letters Patent.

' Patented Sept. 29, 1908.-

Application filed October 11, 1907. Serial No. 396,878.

To all lwhom it may concern:

Be it known that I, OswALD S. PULLIAM, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented certain new anduseful Improvements in Car-Wheels, of which the following is aspecification.

My invention relates to car-wheels and more articularly to steel-tiredwheels.

In t e accompanying drawing, which illustrates applications of myinvention, Fi ure 1 is a cross sectional view of a car-whee flask andsteel-tired wheel located therein; Fig. 2 a similar view of my wheelshowin position of wheel-center; Fig. 3 a sectiona view of iinishedwheel taken on line 3 3 of Fig. 4;

Fig. 4 a broken plan 3' and Fig. 5, a broken plan of a modified form ofwheel-center.

Referrin to the drawing, 1 designates a steel-tire ofthe usual and wellknown form inclosing a wheel-center. The wheel-center as illustrated andas preferred is made of cast-metal and comprises a hub-portion 2 and aplurality or series ofradially extending members or pieces 3. Thesemembers 3 may be in the form shown by Fig. 3 or in the form of spokes asshown by Fig. 5. The members 3 are formed integral with the hub 2 andare each formed on its outer end with a head 4. In addition to the head4 each member is formed with one. or more vwaved or corrugated portions5 the number, shape and de th of the corrugations may be varied.

n the drawing, I have illustrated the preferred method of making mycar-wheels.

That is to say, Fig.4 1 shows a flask 6 of the usual style employed inmaking car-wheels with the steel-tire embedded in the molding sand. Themold-cavity for the wheel-center is formed within the steel-tire, or ifdesired instead of employing a steel-tire for a chill another form ofchill may be used. The mold-cavity in addition to being formed to roducethe hub and the radial members, is formed to produce the waved orcorrugated portions in said radial members of the wheelcenter. The metalto'form the wheel-center is poured into the mold-cavity against thesteel-tire or other form of chill and assumes the position shown byFig. 1. After pouring, though, the wheel-center contracts somewhat,causing the periphery of the wheelcenter to draw away aslight distancefrom the steel-tire into the position as illustrated pressure to forcethe center against the tire as shown by Fig. 3. The pressure tends .tostraighten the corrugated portions, said corrugations being of lessdepth after being pressed than before the pressure was applied.

In the form of Fig. 5, the corrugated portions of the s okes, aftercontraction as abo-ve describe are bent or straightened by means ofsuitable tools. The inner surface of the tire is preferably providedwith a series of nibs 7 against which the wheel-center is poured.

What I claim is:

1. A steel-tired car-wheel having a castmetal wheel-center comprising ahub-portion and' a plurality of radially extending segmental membersformed integral with the hub-portion, each of said members formed with awaved or corrugated portion and a tire-contracting-member.

2. A car-wheel having a metallic tire, and a separate wheel-centercomprising a hubportion andy a plurality of radially extending segmentalmembers formed integral with the hub-portion, each of said membersformed rwith a waved or corrugated portion.

3. A car-wheel having a metallic tire, and a separate wheel-centercomprising a hubportion and a plurality of radially extending segmentalmembers formed integral with the hub portion, each of said membersformed with a waved or corrugated portion and a tire-contacting-member.Y

4. The method of making car-wheels which consists in casting awheel-center with waved or corrugated radially extending members withina steel-tire, and then after the contraction of thewheel-centersubjecting the corrugated portions to sufficient pressure tocause the periphery of the wheel-center to come into contact with thetire.

5. The method of making car-wheels which consists in casting awheel-center with 100 waved or corrugated radially extending Intestimony whereof I aHx my signature members Within a chill, placing theWheeiin presence of' two Witnesses. center Within a metallic-tire andthen subj eating the corrugated portions of the Wheel- OSWALD S'PULLIAM' 5 center to suiieent pressure to cause the pe- Witnesses:

riphery ofthe Wheel-center to come into eon- A, C. WAY7 tact with thetire. v W. G. DooLITTLE.

